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Wastewater treatment with a new electrically enhanced biomass concentrator reactor: trial application and technological perspectives

Cecconet, Daniele, Omodeo Salè, Erica, Callegari, Arianna, Capodaglio, Andrea G.
Environmental technology 2019 v.40 no.7 pp. 896-902
biomass, chemical oxygen demand, electric field, energy efficiency, environmental technology, fouling, membrane bioreactors, wastewater treatment
Biomass concentrator reactors (BCRs) are an alternative wastewater treatment technology developed as a possible solution to membrane bioreactors’ (MBRs) high construction and energetic costs. BCRs are an alternative based on the same principle of biomass retention, using a coarser filter medium instead of a membrane. A BCR-derived technology enhanced by an electric field called electrically enhanced biomass concentrator reactor (E₂BCR) was developed, designed, and tested for wastewater treatment at different organic loads for a period of 100 days. The electrically enhanced reactor showed better chemical oxygen demand (COD) removal performances that the non-enhanced control reactor (90% and 84%, respectively), and a lower fouling tendency. The E₂BCR proved to be more energy efficient in comparison with the control reactor in terms of energy consumption per mass of COD removed.